啪嗒啪嗒作响的阀  flip-flop valve

奇异线性二次指标最优控制问题LQ问题  singular linear quadratic LQ problem

常出问题  constant problem

动力输出问题  power take-off problem

防治煤与瓦斯突出问题  Prevention against coal and gas blasting

提出问题  interrogate; challenge; question; raise the question; query

突出问题  outstanding issues; existing problems; prominent problems; Prominent problem

易出问题的井  critical well

溢出问题  overflow problem

找出问题  find problem

不确定原因非再现问题  hiccup

发现问题  discovering problem; discover questions

函数发现问题  finding function problem

生态环境地质问题现状与治理  Status quo of ecological environmental geological

世界粮食安全问题现状  Current Situation of World Food Security

问题现象  problem phenomenon

行为问题现状  behavioral problems status

音声问题  vocal problem

常问问题  frequently asked question; Frequently asked questions; FAQ